Fermi Large Area Telescope Fourth Source Catalog Data Release 2
J. Ballet, T.H. Burnett, S.W. Digel, B. Lott (for the, Fermi-LAT collaboration)

TL;DR
This paper presents an updated gamma-ray source catalog from the Fermi-LAT telescope, incorporating ten years of data, new source identifications, and revised spectral and temporal information.
Contribution
It provides an incremental update to the fourth Fermi-LAT source catalog with new sources, associations, and refined analysis methods based on a decade of data.
Findings
723 new gamma-ray sources identified
53 sources newly associated with counterparts
Light curves updated with 1-year intervals
Abstract
We present an incremental version (4FGL-DR2, for Data Release 2) of the fourth Fermi-LAT catalog of gamma-ray sources. Based on the first ten years of science data in the energy range from 50 MeV to 1 TeV, it uses the same analysis methods as the 4FGL catalog did for eight years of data. The spectral parameters, spectral energy distributions and associations are updated for all sources. Light curves are rebuilt for all sources with 1-year intervals (not 2-month intervals). Among the 5064 4FGL sources, 120 are formally below the detection threshold over 10 years (but are kept in the list), while 53 are newly associated and four associations were withdrawn. We report 723 new sources, mostly just above the detection threshold, among which two are considered identified and 341 have a plausible counterpart at other wavelengths.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsParticle Detector Development and Performance · Gamma-ray bursts and supernovae · Particle physics theoretical and experimental studies
